To find and list all hidden files in a directory recursively on a Linux or Unix-like system, you can use the following command: $ find <directory> -name “.*” -type f For example, to find all hidden files in the current directory and all of its subdirectories: $ find . -name “.*” -type f The find … Read more

To end a task with a specific PID in Linux, you can use the kill command. $ kill <PID> For example, if the PID of the task you want to end is 12345: $ kill 12345 If the task does not respond to the kill signal, you can try using the -9 option, which sends … Read more

You can copy the contents of one file to another file in Linux using the cp command or the cat command. Using cp: $ cp <source_file> <destination_file> Using cat: $ cat <source_file> > <destination_file> Note: if the destination file already exists, it will be overwritten by the contents of the source file.

To upgrade to a newer version of Ubuntu 14.04 LTS, you need to follow these steps: Back up your important data: Before you start the upgrade process, it’s a good idea to back up your important data, such as documents, photos, and music, to an external storage device. Check your current version: Before upgrading, you … Read more

There are several commands you can use to view a file in Linux and Unix operating systems: cat: The cat command is used to concatenate and display the contents of a file. It can be used to view the entire contents of a file or to display specific parts of a file. For example: cat … Read more

You can compile and run a C/C++ code in Linux using the following steps: Open a terminal window. Create a file for your C/C++ code and save it with a .c or .cpp extension, e.g. code.c or code.cpp. Compile the code using the GCC compiler by running the following command: gcc code.c -o code or … Read more

You can install ssh on Ubuntu Linux using the apt-get package manager by following these steps: Open a terminal window. Update the package index by running the following command: sudo apt-get update Install ssh by running the following command: sudo apt-get install openssh-server Verify that ssh is installed by checking the version: ssh -v You … Read more

The error “crontab: no crontab for user using an empty one” occurs when you try to edit the crontab file of a user that doesn’t have a crontab file yet. The solution is to create a new crontab file for the user: Open a terminal window. Run the following command to create a new crontab … Read more

Here’s how you can create and use a live USB Fedora Linux media on OS X: Download the Fedora Linux ISO image from the Fedora website. Insert a USB drive into your Mac. Open the Terminal application. Find the disk identifier for the USB drive by running the following command: diskutil list Unmount the USB … Read more

To use the yum command with a proxy server on CentOS, RHEL, or Fedora Linux, you need to modify the /etc/yum.conf file and add the proxy server settings. Here’s how you can do this: Open the /etc/yum.conf file using a text editor: sudo nano /etc/yum.conf Add the following lines to the file, replacing PROXY_HOST and … Read more